CN112459947A - Guide bearing structure for reducing oil mist of hydraulic generator - Google Patents
Guide bearing structure for reducing oil mist of hydraulic generator Download PDFInfo
- Publication number
- CN112459947A CN112459947A CN202011410459.0A CN202011410459A CN112459947A CN 112459947 A CN112459947 A CN 112459947A CN 202011410459 A CN202011410459 A CN 202011410459A CN 112459947 A CN112459947 A CN 112459947A
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- Prior art keywords
- oil
- bearing
- shaft collar
- reducing
- oil tank
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- Pending
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- 239000003595 mist Substances 0.000 title claims abstract description 36
- 230000000903 blocking effect Effects 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims description 11
- 230000001154 acute effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 111
- 239000010687 lubricating oil Substances 0.000 abstract description 21
- 238000001704 evaporation Methods 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 238000009834 vaporization Methods 0.000 abstract description 3
- 230000008016 vaporization Effects 0.000 abstract description 3
- 239000000428 dust Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/06—Bearing arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N19/00—Lubricant containers for use in lubricators or lubrication systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N39/00—Arrangements for conditioning of lubricants in the lubricating system
- F16N39/02—Arrangements for conditioning of lubricants in the lubricating system by cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2270/00—Controlling
- F16N2270/50—Condition
- F16N2270/56—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2270/00—Controlling
- F16N2270/60—Pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a guide bearing structure for reducing oil mist of a hydraulic generator, which relates to the field of generators and comprises a bearing and a bearing oil tank, wherein the wall surface of an oil blocking pipe, the wall surface of an oil blocking plate, a shaft collar and the inner wall of the oil tank in the bearing oil tank are covered with an oil dredging layer or an ultra oil dredging layer; the friction force between the turbine and the wall surface of an oil blocking pipe, the wall surface of an oil blocking plate, a shaft collar or the inner wall of an oil tank is reduced under the action of oil layer dredging or super oil layer dredging so as to achieve the purposes of reducing the temperature of lubricating oil and reducing the evaporation of oil mist; meanwhile, the friction resistance of a contact area of the shaft collar and lubricating oil is reduced, the fluctuation of the oil level in the bearing oil tank is also reduced, the oil level surge is reduced, namely the contact area of the lubricating oil and air is reduced, the vaporization degree of the lubricating oil is also relieved, the overflowing amount of the lubricating oil through a gap at the oil blocking pipe of the bearing is also reduced, and the purpose of reducing the oil mist overflowing amount is further achieved.
Description
Technical Field
The invention relates to the field of generators, in particular to a guide bearing structure for reducing oil mist of a hydraulic generator.
Background
In the operation process of a hydropower station, the phenomenon of lubricating oil overflow always occurs on the lower guide bearing of the water-turbine generator set, the oil mist overflow of the water-turbine generator set cannot cause equipment accidents quickly generally, and the human health cannot be harmed in a short period, so that the oil mist overflow treatment is always neglected easily compared with oil throwing. However, the harm will gradually appear with the accumulation of time, and the harm is generally shown in the following aspects:
(1) oil accumulation on the ground and other places in the wind tunnel of the generator easily causes workers to slip, and meanwhile, when oil mist is scattered in a factory building, particularly an underground factory building, the health of the lung of the workers is affected;
(2) the overflow of oil mist can affect the insulation life of the generator, and the oil mist and dust are accumulated at the stator core ventilation channel and the rotor magnetic pole ventilation channel, so that the ventilation and heat dissipation of the generator are poor, and the heat dissipation effect is affected; the engine oil is an organic solvent and can corrode part of the insulating material; the oil mist can be mixed with dust, conductive particles possibly exist in the dust, and the dust is adsorbed on an insulating layer for a long time to corrode the insulation of a generator coil bar and the like, so that the insulation performance of the generator coil bar is reduced, the aging is accelerated, the short circuit or the breakdown of a generator winding is easily caused, and the potential harm is brought to the safe and stable operation of a unit;
(3) oil mist can overflow into the slip ring chamber, so that the slip ring is in contact with the carbon brush to strike fire, and the service life of the slip ring is influenced;
(4) oil mist may condense at the mechanical brake ring and the air brake, and the high temperature during braking may cause oil smoke.
Disclosure of Invention
The invention aims to solve the problems and designs a guide bearing structure for reducing oil mist of a hydraulic generator.
The invention realizes the purpose through the following technical scheme:
a guide bearing structure for reducing hydraulic generator oil mist comprises a bearing and a bearing oil tank, wherein an oil blocking pipe wall surface, an oil blocking plate wall surface, a shaft collar and an oil tank inner wall below an oil surface in the bearing oil tank are covered with an oil dredging layer or an ultra oil dredging layer.
The invention has the beneficial effects that: the friction force between the turbine and the wall surface of an oil blocking pipe, the wall surface of an oil blocking plate, a shaft collar or the inner wall of an oil tank is reduced under the action of oil layer dredging or super oil layer dredging so as to achieve the purposes of reducing the temperature of lubricating oil and reducing the evaporation of oil mist; meanwhile, the friction resistance of a contact area of the shaft collar and lubricating oil is reduced, the fluctuation of the oil level in the bearing oil tank is also reduced, the oil level surge is reduced, namely the contact area of the lubricating oil and air is reduced, the vaporization degree of the lubricating oil is also relieved, the overflowing amount of the lubricating oil through a gap at the oil blocking pipe of the bearing is also reduced, and the purpose of reducing the oil mist overflowing amount is further achieved.
Drawings
Fig. 1 is a schematic structural view of a guide bearing structure for reducing oil mist of a hydro-generator according to the present invention;
FIG. 2 is an enlarged view of a portion A of the guide bearing structure for reducing oil mist of the hydraulic generator according to the present invention;
wherein corresponding reference numerals are:
1-shaft collar, 2-bearing bush, 3-shaft collar pump hole, 4-lubricating oil, 5-oil retaining pipe, 6-oil retaining ring, 7-oil retaining plate, 8-oil receiving groove, 9-oil supply pipe, 10-main shaft, 11-oil discharge pipe, 12-bearing oil tank, 13-oil overflow pipe, 14-cooling pipeline, 15-exhaust hole, 16-spiral cooling pipe and 17-air pressure control system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inside", "outside", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The following detailed description of embodiments of the invention refers to the accompanying drawings.
A lead bearing structure for reducing hydraulic generator oil mist, including bearing and bearing oil tank 12, the oil baffle 5 wall in the bearing oil tank 12, the wall of oil baffle 7, collar 1 and oil tank inner wall all cover and are dredged the oil reservoir or super oil-dredging layer.
The friction force between the turbine and the wall surface of the oil blocking pipe 5, the wall surface of the oil blocking plate 7, the shaft collar 1 or the inner wall of the oil tank is reduced through the action of oil layer dredging or super oil layer dredging so as to achieve the purposes of reducing the temperature of lubricating oil 4 and reducing the evaporation of oil mist; meanwhile, the fluctuation of the oil level in the bearing oil tank 12 is reduced, the friction resistance of the contact area of the shaft collar 1 and the lubricating oil 4 is reduced, the oil level surge is reduced, namely the contact area of the lubricating oil 4 and the air is reduced, the vaporization degree of the lubricating oil 4 is relieved, the overflowing amount of the lubricating oil 4 through the gap at the oil blocking pipe 5 of the bearing is reduced, and the purpose of reducing the oil mist overflowing amount is achieved.
The size of one end, close to the oil blocking pipe 5, of a shaft collar pump hole 3 in the shaft collar 1 is smaller than that of one end, close to the bearing bush 2, of the shaft collar pump hole 3.
The shaft collar pump hole 3 is a tapered hole.
The dimension of one end of the shaft collar pump hole 3 on the shaft collar 1, which is close to the oil blocking pipe 5, is phi 10-phi 12, and the dimension of one end of the shaft collar pump hole 3, which is close to the bearing bush 2, is phi 16.
The size of one end of the shaft collar pump hole 3 close to the oil baffle plate 7 is larger than that of one end of the shaft collar pump hole 3 close to the bearing bush 2, according to the hydrodynamics Bernoulli equation, the lubricating oil 4 flows along the tapered hole to the outer edge of the shaft collar 1 under the condition that the flow rate is determined, the speed of the lubricating oil 4 in the tapered hole is gradually reduced from an inlet to an outlet, meanwhile, the pressure is gradually increased, the pressure of a bearing oil film is properly increased by the tapered hole, the radial stress of the bearing bush 2 of the guide bearing is improved, meanwhile, the speed inside the shaft collar pump hole 3 is reduced, the friction between the lubricating oil 4 and the wall surface of the shaft collar pump hole 3 is reduced, and the friction heat is reduced.
The acute angle included angle between the central axis of the shaft collar pump hole 3 and the central axis of the bearing bush 2 is 41-41.25 degrees.
The bearing structure further comprises an air pressure control system 17 used for controlling air pressure in the bearing oil tank 12, the bearing oil tank 12 is provided with an air inlet and an air outlet, the air inlet and the air outlet of the bearing oil tank 12 are communicated with the air outlet and the air inlet of the air pressure control system 17 respectively, and the air pressure in the bearing oil tank 12 is larger than the air pressure outside the bearing oil tank 12.
The bearing structure further comprises a spiral cooling pipe 16 for cooling oil mist gas, and a gas inlet and a gas outlet of the spiral cooling pipe 16 are respectively communicated with a gas outlet of the bearing oil tank 12 and a gas inlet of the air pressure control system 17.
The air pressure in the bearing oil tank 12 is controlled by the air pressure control system 17 to be higher than the air pressure outside the bearing oil tank 12, the boiling point of the lubricating oil 4 in the oil tank is reduced, the higher the air pressure is, the higher the boiling point of the oil is under the condition that the oil temperature of the same oil is the same, the higher the air pressure is, the higher the boiling point of the oil is, the air pressure in the bearing oil tank 12 is, the generation of oil mist can be effectively reduced, meanwhile, after the air in the bearing oil tank 12 is pumped out by the air pressure control system 17, the oil mist in the bearing oil tank 12 is carried in the air, the oil mist quantity in the bearing oil tank 12 is reduced, when the air passes through the spiral cooling pipe 16, the spiral cooling pipe 16 cools the air, the cooled and liquefied oil is kept in the spiral cooling pipe 16 to be changed into air with lower temperature, then the air with lower temperature is guided into the bearing oil tank 12 by the, the temperature and the oil temperature in the bearing oil tank 12 are reduced, and the evaporation capacity of the oil mist is further reduced.
The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.
Claims (7)
1. A lead bearing structure for reducing hydraulic generator oil mist, including bearing and bearing oil tank, its characterized in that: the oil blocking pipe wall surface, the oil blocking plate wall surface, the shaft collar and the oil tank inner wall below the oil surface in the bearing oil tank are all covered with an oil-dredging layer or an ultra-oil-dredging layer.
2. The guide bearing structure for reducing oil mist of a hydro-generator according to claim 1, wherein: the size of one end, close to the oil blocking pipe, of a shaft collar pump hole in the shaft collar is smaller than that of one end, close to the bearing bush, of the shaft collar pump hole.
3. The guide bearing structure for reducing oil mist of a hydro-generator according to claim 2, wherein: the shaft collar pump hole is a tapered hole.
4. The guide bearing structure for reducing oil mist of a hydro-generator according to claim 2 or 3, wherein: the size of the end, close to the oil retaining pipe, of the shaft collar pump hole on the shaft collar is phi 10-phi 12, and the size of the end, close to the bearing bush, of the shaft collar pump hole is phi 16.
5. The guide bearing structure for reducing oil mist of a hydro-generator according to any one of claims 1 to 3, wherein: the acute angle included angle between the central axis of the shaft collar pump hole and the central axis of the bearing bush ranges from 41 degrees to 41.25 degrees.
6. The guide bearing structure for reducing oil mist of a hydro-generator according to claim 5, wherein: the bearing structure further comprises an air pressure control system used for controlling air pressure in the bearing oil tank, the bearing oil tank is provided with an air inlet and an air outlet, the air inlet and the air outlet of the bearing oil tank are communicated with the air outlet and the air inlet of the air pressure control system respectively, and the air pressure in the bearing oil tank is larger than the air pressure outside the bearing oil tank.
7. The guide bearing structure for reducing oil mist of a hydro-generator according to claim 6, wherein: the bearing structure further comprises a spiral cooling pipe used for cooling oil mist gas, and a gas inlet and a gas outlet of the spiral cooling pipe are respectively communicated with a gas outlet of the bearing oil tank and a gas inlet of the air pressure control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011410459.0A CN112459947A (en) | 2020-12-04 | 2020-12-04 | Guide bearing structure for reducing oil mist of hydraulic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011410459.0A CN112459947A (en) | 2020-12-04 | 2020-12-04 | Guide bearing structure for reducing oil mist of hydraulic generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112459947A true CN112459947A (en) | 2021-03-09 |
Family
ID=74805532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011410459.0A Pending CN112459947A (en) | 2020-12-04 | 2020-12-04 | Guide bearing structure for reducing oil mist of hydraulic generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112459947A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB855454A (en) * | 1957-01-08 | 1960-11-30 | Zd Y Jiriho Dimitrova | A bearing arrangement for turbo-hydraulic power plants |
| CN2833219Y (en) * | 2005-02-07 | 2006-11-01 | 陈茂坤 | Oil carrying structure of bearing |
| CN101634324A (en) * | 2009-08-10 | 2010-01-27 | 李新桥 | Material surface ultra-oleophobic structure |
| CN201747508U (en) * | 2010-05-14 | 2011-02-16 | 浙江金轮机电实业有限公司 | Oil mist resistant device for hydraulic turbine |
| KR20130055921A (en) * | 2011-11-21 | 2013-05-29 | 한국수자원공사 | Oil mist reduction device |
| US20150300697A1 (en) * | 2014-04-18 | 2015-10-22 | Panasonic Intellectual Property Management Co., Ltd. | Turbomachine and refrigeration cycle apparatus |
-
2020
- 2020-12-04 CN CN202011410459.0A patent/CN112459947A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB855454A (en) * | 1957-01-08 | 1960-11-30 | Zd Y Jiriho Dimitrova | A bearing arrangement for turbo-hydraulic power plants |
| CN2833219Y (en) * | 2005-02-07 | 2006-11-01 | 陈茂坤 | Oil carrying structure of bearing |
| CN101634324A (en) * | 2009-08-10 | 2010-01-27 | 李新桥 | Material surface ultra-oleophobic structure |
| CN201747508U (en) * | 2010-05-14 | 2011-02-16 | 浙江金轮机电实业有限公司 | Oil mist resistant device for hydraulic turbine |
| KR20130055921A (en) * | 2011-11-21 | 2013-05-29 | 한국수자원공사 | Oil mist reduction device |
| US20150300697A1 (en) * | 2014-04-18 | 2015-10-22 | Panasonic Intellectual Property Management Co., Ltd. | Turbomachine and refrigeration cycle apparatus |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20210309 |